From d57f61dbb4d3d4720edda4319f5d304c9b580d66 Mon Sep 17 00:00:00 2001
From: Victor Skvortsov <vds003@gmail.com>
Date: Tue, 15 Aug 2023 15:43:29 +0500
Subject: [PATCH] Show error on dstack init if no backends configured

---
 .../_internal/cli/commands/init/__init__.py    |  8 ++++++++
 cli/dstack/api/hub/_api_client.py              | 18 ++++++++++++++++++
 cli/dstack/api/hub/_client.py                  | 11 +++++++----
 3 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/cli/dstack/_internal/cli/commands/init/__init__.py b/cli/dstack/_internal/cli/commands/init/__init__.py
index 6d7d56259..561344aaf 100644
--- a/cli/dstack/_internal/cli/commands/init/__init__.py
+++ b/cli/dstack/_internal/cli/commands/init/__init__.py
@@ -80,6 +80,14 @@ def _command(self, args: Namespace):
             )
         )
         hub_client = get_hub_client(project_name=args.project)
+        backends = hub_client.list_backends()
+        if len(backends) == 0:
+            add_backends_url = (
+                f"{hub_client.client_config.url}/projects/{hub_client.project}/backends/add"
+            )
+            raise CLIError(
+                f"No backends configured. To configure a backend, open {add_backends_url}"
+            )
         if repo_credentials is not None:
             hub_client.save_repo_credentials(repo_credentials)
         console.print(f"[green]OK[/]")
diff --git a/cli/dstack/api/hub/_api_client.py b/cli/dstack/api/hub/_api_client.py
index 1d8133237..dcb171d37 100644
--- a/cli/dstack/api/hub/_api_client.py
+++ b/cli/dstack/api/hub/_api_client.py
@@ -25,6 +25,7 @@
 from dstack._internal.hub.schemas import (
     AddTagRun,
     ArtifactsList,
+    BackendInfo,
     JobHeadList,
     JobsGet,
     JobsList,
@@ -75,6 +76,23 @@ def get_project_info(self) -> ProjectInfo:
             return ProjectInfo.parse_obj(resp.json())
         resp.raise_for_status()
 
+    def list_backends(self) -> List[BackendInfo]:
+        url = _project_url(
+            url=self.url,
+            project=self.project,
+            additional_path=f"/backends/list",
+        )
+        resp = _make_hub_request(
+            requests.post,
+            host=self.url,
+            url=url,
+            headers=self._headers(),
+        )
+        if resp.ok:
+            body = resp.json()
+            return [BackendInfo.parse_obj(i) for i in body]
+        resp.raise_for_status()
+
     def get_run_plan(self, jobs: List[Job], backends: Optional[List[str]]) -> RunPlan:
         url = _project_url(
             url=self.url,
diff --git a/cli/dstack/api/hub/_client.py b/cli/dstack/api/hub/_client.py
index 87856758a..cf7621160 100644
--- a/cli/dstack/api/hub/_client.py
+++ b/cli/dstack/api/hub/_client.py
@@ -20,7 +20,7 @@
 from dstack._internal.core.run import RunHead
 from dstack._internal.core.secret import Secret
 from dstack._internal.core.tag import TagHead
-from dstack._internal.hub.schemas import ProjectInfo, RunInfo
+from dstack._internal.hub.schemas import BackendInfo, ProjectInfo, RunInfo
 from dstack.api.hub._api_client import HubAPIClient
 from dstack.api.hub._config import HubClientConfig
 from dstack.api.hub._storage import HUBStorage
@@ -38,12 +38,12 @@ def __init__(
     ):
         self.project = project
         self.repo = repo
+        self.client_config = config
         self._repo_credentials = repo_credentials
         self._auto_init = auto_init
-        self._client_config = config
         self._api_client = HubAPIClient(
-            url=self._client_config.url,
-            token=self._client_config.token,
+            url=self.client_config.url,
+            token=self.client_config.token,
             project=self.project,
             repo=self.repo,
         )
@@ -55,6 +55,9 @@ def validate_config(config: HubClientConfig, project: str):
             url=config.url, token=config.token, project=project, repo=None
         ).get_project_info()
 
+    def list_backends(self) -> List[BackendInfo]:
+        return self._api_client.list_backends()
+
     def create_run(self, run_name: Optional[str]) -> str:
         return self._api_client.create_run(run_name)